I have noticed that if I am working with Images and have a tree branch open I cannot just go to audio and add a few more tracks to PN without losing the location of the the opened Image tree branch. In this sense MC11.1 worked better.
I always have "views>split views>2 views" in action. After dragging the view splitter right down to the bottom to hide the inactive view, you wouldn't know you had two views active, but, when faced with the quoted situation, a click on the view splitter brings the inactive view into play and I can go to another area of the library without losing my place in the current image workflow.
It works really well, just remember the view does not become active untill you click inside it.
After bringing the second view out of hiding the first time, it may only show in the bottom half. Drag the splitter all the way to the top, and from then on, MC will remember the state of each view, even across sessions.
There's a bug in there somewhere atm that will hopefully be fixed soon where MC keeps switching the focus. It happens when returning from full screen, and with recent builds, also after OK'ing out of the options dialogue.